[Closed] Mechanics of STW, what could this fault be?

It'll be hose leak/blockage, the wiring, the egr valve or solenoid, probably 🙂

My guess is a blockage. Could be an easy fix, is unlikely to be very expensive in reality. I don't have a Ford dongle but I have tools to fix such things if you need help.

Reset it - if it comes on again - look into it further.

If it stays off, pretend you didn't see it.

That's my usual course of action! 🙂

I wouldn't reset it. If it's not happening again it'll go away on its own. If you reset it you might hinder diagnostic efforts.

Italian tune up needed?*

*IHAFCWITA

Have you had the car long? The seller may have reset the fault codes when selling the car and the car is only now showing the fault after having been reset.

We blanked off the EGR on our 2007 1.8 Galaxy and the engine light came on for this reason. You can reset it to get rid of the light but it'll come back on after 3 engine starts. We just leave ours on now and check it periodically to make sure there's nothing else causing the light to come on.

edit- also check all the turbo hoses and clips. One of the clips on ours blew off (fair enough, it was nearly 12 years old at the time and under the car in all weathers) and the hose came off whatever is was that it was feeding into. We were able to limp the car home and my OH fixed it (new hose clip, 50p).

One of the common problems with many Ford vehicles that can cause the trouble code P0401 is a bad or damaged DPFE sensor (DPFE stands for Delta Pressure Feedback EGR). When diagnosing the code P0401 on a Ford vehicle, the DPFE sensor and the hoses to the DPFE sensor are usually tested first. The DPFE sensor and its hoses should hold the vacuum; the hoses should not be cracked or restricted. The sensor signal voltage should change when the vacuum is applied. Sometimes the DPFE sensor hoses could be reversed during a repair and this also could cause the code P0401. Often, replacing the DPFE sensor with an updated part could solve the problem, however, other components of the EGR system also need to be checked. This thread shows EGR system components in the 2.3L Ford Ranger.
If you are replacing the DPFE sensor, make sure the hoses are installed correctly and not crossed.

We blanked off the EGR on our 2007 1.8 Galaxy and the engine light came on for this reason.

You need to be very careful about that these days. It's an MOT failure it they spot it, possibly the bad type where they don't let you drive it away.

EGR is clogged and as mentioned above, can be blocked off on these. Search ebay and you should find blanking plate for about £3.
Can't remember with this, but you may be able to just unplug the EGR and it will default shut.
I still have the Haynes for one of these that I can post you if you want, does the DM thing work on here yet?

Clear it. give it a hard time so 3rd gear 60mph get some heat into it.

See if it comes back...

EGR valve is a really simple, free but quite dirty job.Was on my Transit of a similar age anyway, not sure how similar the Ford stuff is. Definitely worth a go. Clean all the air inlets and things while you are at it. I blanked my EGR valve when I did it, no problems whatsoever in the remaining six years I had it before the tin worms ate it. Haynes or google will tell you where it is and what it looks like

Sorry for the delay in replying, been trying to deal with stuff here. Thanks for all the replies, all helpful as usual. Will have a search on what's been suggested and see where I go from there.

@timber - I've pm'd you, not sure if its working or not though as you mentioned.

@gnusmas - got it, will probably send Thursday.

Probably a sooted up EGR. Allow an hour or so for removal, cleaning and refit. Toothebrush, some Mr muscle oven cleaner. Should be a youtube video for that engine as its very common

You can block the EGR on these but the recirculated gas is designed to reduce the inlet charge temperature to the turbo. This will lead to premature failure of the Turbo as it will be running constantly hotter. They normally get gunged up. You can clean them but the shaft is normally mullered. They aren’t expensive or difficult to replace. I replaced mine at 110K on my 130 Mk3 TDCi.

I had the same car, same engine. I didn't get a fault but took the EGR off one day, it was clogged with soot.

Cleaning it is very easy but very messy, get disposable gloves, your oldest clothes, some carb cleaner and a toothbrush. Wear goggles and don't go within 50 metres of your carpets for 24 hours after cleaning it 🙂

The valve in it should move freely after cleaning. I wouldn't bother blanking it off.